System Sensor System Sensor 2151T Photoelectric Smoke Detector, Low Profile, Plug-In MSRP: Was: Now: $71.09
System Sensor System Sensor 4WT-B Photoelectric i3 Smoke Detector, 4-Wire, 135F fixed thermal sensor MSRP: Was: Now: $58.32
System Sensor System Sensor 4WTA-B Photoelectric i3 Smoke Detector, 4-Wire, Thermal Sensor, Built-In Sounder MSRP: Was: Now: $69.90
System Sensor System Sensor 4WTAR-B Photoelectric i3 Smoke Detector, 4-Wire, Thermal Sensor, Built-In Sounder, Form C Relay MSRP: Was: Now: $78.99